U.S. patent application number 16/955535 was filed with the patent office on 2021-01-14 for turbine housing and washing method of turbine housing.
This patent application is currently assigned to Marelli Corporation. The applicant listed for this patent is MARELLI CORPORATION. Invention is credited to Hiroyuki OKAMOTO.
Application Number | 20210010390 16/955535 |
Document ID | / |
Family ID | 1000005123162 |
Filed Date | 2021-01-14 |
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United States Patent
Application |
20210010390 |
Kind Code |
A1 |
OKAMOTO; Hiroyuki |
January 14, 2021 |
Turbine Housing and Washing Method of Turbine Housing
Abstract
A turbine housing is provided with an inner pipe forming a
spiral-shaped exhaust gas flow path, an exhaust-air-inlet-side
flange serving as an exhaust gas inlet to the inner pipe, and an
outer pipe that, together with the exhaust-air-inlet-side flange,
covers and seals the inner pipe. The outer pipe has an opening
through which the washing fluid can pass through and a closing
member that closes the opening, and a space through which the
washing fluid can pass through is formed between the inner pipe and
the exhaust-air-inlet-side flange.
Inventors: |
OKAMOTO; Hiroyuki;
(Saitama-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
MARELLI CORPORATION |
Saitama-shi, Saitama |
|
JP |
|
|
Assignee: |
Marelli Corporation
Saitama-shi, Saitama
JP
|
Family ID: |
1000005123162 |
Appl. No.: |
16/955535 |
Filed: |
November 15, 2018 |
PCT Filed: |
November 15, 2018 |
PCT NO: |
PCT/JP2018/042238 |
371 Date: |
June 18, 2020 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B08B 9/0321 20130101;
F01D 25/002 20130101; F01D 25/24 20130101 |
International
Class: |
F01D 25/00 20060101
F01D025/00; F01D 25/24 20060101 F01D025/24; B08B 9/032 20060101
B08B009/032 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 22, 2017 |
JP |
2017-245804 |
Claims
1. A turbine housing comprising: an inner pipe forming a
spiral-shaped exhaust gas flow path; an exhaust-air-inlet-side
flange forming an exhaust gas inlet to the inner pipe; and an outer
pipe configured to, together with the exhaust-air-inlet-side
flange, cover and seal the inner pipe, wherein the outer pipe has
an opening and a closing member for closing the opening, the
opening being configured such that the washing fluid can pass
through, and a space is formed between the inner pipe and the
exhaust-air-inlet-side flange, the space being configured such that
the washing fluid can pass through.
2. The turbine housing according to claim 1, wherein the opening is
positioned directly above an apex of a scroll shape in the
spiral-shaped exhaust gas flow path when the turbine housing is
placed such that the exhaust-air-inlet-side flange faces
downward.
3. The turbine housing according to claim 1, wherein the opening is
positioned directly above the spiral-shaped exhaust gas flow path
when the turbine housing is placed such that the
exhaust-air-inlet-side flange faces downward.
4. The turbine housing according to claim 1, wherein the inner pipe
includes two sheet-metal-made inner-pipe divided bodies, the
sheet-metal-made inner-pipe divided bodies being in a state in
which end portions of the sheet-metal-made inner-pipe divided
bodies are mutually abutted, and the opening faces the abutting
portion of the inner-pipe divided body.
5. The turbine housing according to claim 1, wherein the inner pipe
is provided slidably with respect to the exhaust-air-inlet-side
flange in the space between the inner pipe and the
exhaust-air-inlet-side flange.
6. A washing method of a turbine housing, the turbine housing being
provided with a scroll portion forming a spiral-shaped exhaust gas
flow path between an exhaust-air-inlet-side flange forming an
exhaust gas inlet and an exhaust-air-outlet-side flange forming the
exhaust gas outlet, the scroll portion being formed of an inner
pipe, the inner pipe being at least formed of sheet-metal-made
inner-pipe divided bodies divided into a plurality of parts, and
the turbine housing having a double-shell structure with a space
between the inner pipe and an outer pipe such that the exhaust gas
is discharged via a turbine wheel to an exhaust air outlet side,
the inner pipe being covered by the outer pipe formed of
sheet-metal-made outer pipe divided bodies divided into a plurality
of parts so as to form the space between the inner pipe and the
outer pipe, wherein after the plurality of parts forming the
turbine housing are assembled and subjected to processing, the
washing fluid is supplied from one of a liquid supply/discharge
port provided at a position facing the exhaust gas inlet of the
outer pipe or the space provided between a lower end portion of the
inner pipe on an exhaust-air-inlet side and the
exhaust-air-inlet-side flange, and the washing fluid is allowed to
flow out from other of the liquid supply/discharge port or the
space together with extraneous matter generated during the
processing.
Description
CROSS-REFERENCE TO RELATED APPLICATION(S)
[0001] This application is a national stage 371 application of
PCT/JP2018/042238, filed on Nov. 15, 2018, which claims priority to
Japan Application Patent Serial No. 2017-245804, filed Dec. 22,
2017, the entire disclosures of which are hereby incorporated by
reference.
TECHNICAL FIELD
[0002] The present invention relates to a turbine housing used for
a turbocharger (turbo-supercharger) of a vehicle and to a washing
method of the turbine housing.
BACKGROUND
[0003] As a turbine housing used for a turbocharger, that made of a
cast metal is generally used. In contrast, Japanese Unexamined
Patent Application Publication No. 2017-89450 proposes, for
example, a turbine housing that is fabricated by press molded parts
of steel plates. This turbine housing is provided with a scroll
portion that forms a spiral (spiral shaped) exhaust gas flow path
between an exhaust-air-inlet-side flange forming an exhaust gas
inlet and an exhaust-air-outlet-side flange forming an exhaust gas
outlet. In this turbine housing, the scroll portion is formed of an
inner pipe, and this inner pipe is covered by an outer pipe such
that a space is formed therebetween. In the above, the inner pipe
is formed of two sheet-metal-made inner-pipe divided bodies that
have been divided and a cast-metal-made inner-pipe divided body
that is positioned at a regional part facing a turbine wheel
provided at the center of the scroll portion, and the outer pipe is
formed of two sheet-metal-made outer pipe divided bodies that have
been divided. By having such a configuration, the turbine housing
has a double-shell (double pipe) structure having the space between
the outer pipe and the inner pipe, which is formed such that
exhaust gas is discharged to the exhaust air outlet side via the
turbine wheel.
SUMMARY
[0004] In a turbine housing, although it is necessary to suppress
trapping of extraneous matter in an interior of the turbine
housing, because the space between the inner pipe and the outer
pipe of the turbine housing is a closed space, if the extraneous
matter enters between the inner pipe and the outer pipe, it is
difficult to remove the extraneous matter.
[0005] Thus, an object of the present invention is to provide a
turbine housing from which extraneous matters in an interior of a
turbine housing can be removed by washing and to provide a washing
method of the turbine housing.
[0006] A turbine housing according to the present invention
includes: an inner pipe forming a spiral-shaped exhaust gas flow
path; an exhaust-air-inlet-side flange forming an exhaust gas inlet
to the inner pipe; and an outer pipe configured to, together with
the exhaust-air-inlet-side flange, cover and seal the inner pipe,
wherein the outer pipe has an opening and a closing member for
closing the opening, the opening being configured such that the
washing fluid can pass through, and a space is formed between the
inner pipe and the exhaust-air-inlet-side flange, the space being
configured such that the washing fluid can pass through.
[0007] A washing method of a turbine housing according to the
present invention, the turbine housing being provided with a scroll
portion forming a spiral-shaped exhaust gas flow path between an
exhaust-air-inlet-side flange forming an exhaust gas inlet and an
exhaust-air-outlet-side flange forming the exhaust gas outlet, the
scroll portion being formed of an inner pipe, the inner pipe being
at least formed of sheet-metal-made inner-pipe divided bodies
divided into a plurality of parts, and the turbine housing having a
double-shell structure with a space between the inner pipe and an
outer pipe such that the exhaust gas is discharged via a turbine
wheel to an exhaust air outlet side, the inner pipe being covered
by the outer pipe formed of sheet-metal-made outer pipe divided
bodies divided into a plurality of parts so as to form the space
between the inner pipe and the outer pipe, wherein after the
plurality of parts forming the turbine housing are assembled and
subjected to processing, the washing fluid is supplied from one of
a liquid supply/discharge port provided at a position facing the
exhaust gas inlet of the outer pipe or the space provided between a
lower end portion of the inner pipe on an exhaust-air-inlet side
and the exhaust-air-inlet-side flange, and the washing fluid is
allowed to flow out from other of the liquid supply/discharge port
or the space together with extraneous matter generated during the
processing.
[0008] According to the present invention, it is possible to
provide a turbine housing from which extraneous matters in the
interior of the turbine housing can be removed by washing and a
washing method of the turbine housing.
BRIEF DESCRIPTION OF THE DRAWINGS
[0009] FIG. 1 is a side view of a turbine housing used for a
turbocharger of a first embodiment of the present invention;
[0010] FIG. 2 is a front view of the turbine housing;
[0011] FIG. 3 is a rear view of the turbine housing;
[0012] FIG. 4 is a sectional view of the turbine housing;
[0013] FIG. 5 is a sectional view taken along a line V-V in FIG.
4;
[0014] FIG. 6 is a front view showing a washing state of an
interior of the turbine housing;
[0015] FIG. 7 is a sectional view showing the washing state of the
interior of the turbine housing;
[0016] FIG. 8 is a flowchart showing a manufacturing step of the
turbine housing;
[0017] FIG. 9 is a front view of the turbine housing of a second
embodiment of the present invention used in the turbocharger;
[0018] FIG. 10 is a sectional view of the turbine housing of the
second embodiment.
[0019] FIG. 11 is a front view showing the washing state of the
interior of the turbine housing of the second embodiment;
[0020] FIG. 12 is a sectional view showing the washing state of the
interior of the turbine housing of the second embodiment; and
[0021] FIG. 13 is a sectional view of the turbine housing of a
third embodiment of the present invention used in a
turbocharger.
DETAILED DESCRIPTION
[0022] An embodiment of the present invention will be described
below with reference to the drawings.
[0023] A turbine housing 10 of a first embodiment of the present
invention will be first described with reference to FIGS. 1 to
8.
[0024] The turbine housing 10 shown in FIGS. 1 to 4 is used as a
housing of a turbocharger (turbo-supercharger) of a vehicle. The
turbine housing 10 has a double-shell (double pipe) structure
formed of: an inner pipe 20 serving as a scroll portion that forms
a spiral (spiral shaped) exhaust gas flow path K provided among a
cast-metal-made center flange 11, an exhaust-air-inlet-side flange
12, which is made of a cast metal, forming an inlet 12a for exhaust
gas B, and an exhaust-air-outlet-side flange 13 (the downstream
side of exhaust air flow) forming an outlet 13a for the exhaust gas
B; an exhaust tube 30 that is connected to a part of the inner pipe
20 (a cylinder shaped portion 23d) on the exhaust-air-outlet side;
and an outer pipe 40 that covers both of the inner pipe 20 and the
exhaust tube 30 such that a predetermined space G is formed
therebetween. In the turbine housing 10, the exhaust gas B that has
entered from the inlet 12a of the exhaust-air-inlet-side flange 12
is discharged from the outlet 13a of the exhaust-air-outlet-side
flange 13 made of a cast metal via a turbine wheel 14 that is
provided at the spiral center portion (center portion) O of the
inner pipe 20.
[0025] As shown in FIG. 1, a compressor 15 is connected to the
center flange 11. In addition, a catalytic converter (emission
control device) 16 for removing toxic pollutants from the exhaust
gas B is connected via a joint flange 17 and a joint tube 18 to the
exhaust-air-outlet-side flange 13 through which the exhaust gas B
is discharged. In other words, the turbine housing 10 is disposed
between the compressor 15 provided on the intake air inlet side and
the catalytic converter 16.
[0026] As shown in FIGS. 2 and 4, the inner pipe (the scroll
portion) 20 essentially defines and forms the spiral-shaped exhaust
gas flow path K for the exhaust gas B in the housing. In addition,
the outer pipe 40 forms an outer-shell structure body that
completely covers the inner pipe 20 and the exhaust tube 30 such
that the predetermined space G is formed between the outer pipe 40
and both of the inner pipe 20 and the exhaust tube 30, that
encloses the inner pipe 20 and the exhaust tube 30 so as to
simultaneously provide protection and thermal insulation, and that
achieves the purpose of increasing rigidity of the turbine housing
10 as a whole.
[0027] As shown in FIG. 4, the inner pipe 20 is formed of: a first
inner-pipe divided body 21 and a second inner-pipe divided body 22
that are formed by being divided into two members along the
direction orthogonal to the shaft direction L of a turbine shaft
(driving shaft) 14a of the turbine wheel 14; and a third inner-pipe
divided body 23 that is located at a regional part facing the
turbine wheel 14 (a region on the side of the exhaust air outlet of
the exhaust gas B). The first inner-pipe divided body 21 and the
second inner-pipe divided body 22 are formed of thin plate-like
shaped sheet-metal-made scroll members, and the third inner-pipe
divided body 23 is formed of a scroll plate member made of the cast
metal, which is formed by casting as a material having higher heat
resistance than the material made of sheet metal.
[0028] As shown in FIGS. 2 and 4, the first inner-pipe divided body
21 and the second inner-pipe divided body 22 are molded into a
predetermined curved tube shape by subjecting the sheet metal to
press working. A rear-circumferential-edge-side end portion 21b and
a front-circumferential-edge-side end portion 22a of two thus-press
molded members made of sheet metal, i.e. the first inner-pipe
divided body 21 and the second inner-pipe divided body 22,
respectively, are jointed and fixed by being welded. In other
words, the end portion 21b of the first inner-pipe divided body 21
on the rear circumferential edge side and the end portion 22a of
the second inner-pipe divided body 22 on the front circumferential
edge side are formed by being bent outward so as to respectively
have different vertical lengths, and these end portions 21b and 22a
having different lengths are mutually fixed by being welded (a
welded portion is shown by a reference sign E).
[0029] In addition, as shown in FIGS. 2 and 4, the third inner-pipe
divided body 23 is the cast metal part and is molded into the
predetermined curved tube shape. As shown in FIG. 4, an end portion
22b of the sheet-metal-made second inner-pipe divided body 22 on
the rear circumferential edge side is joined and fixed to an end
portion 23b having a stepped-recessed shape of the cast-metal-made
third inner-pipe divided body 23 on the rear outer circumference
edge side by being welded on the reverse side surface of a flow
path surface k of the exhaust gas flow path K (a welded portion is
shown by the reference sign E). With such a configuration, the
regional part of the inner pipe 20 facing the turbine wheel 14 as
the region on the side of the exhaust air outlet of the exhaust gas
B is formed of the cast-metal-made third inner-pipe divided body 23
that is made of the cast-metal-made scroll member. In addition, a
remaining regional part of the inner pipe 20 is formed of the
sheet-metal-made first inner-pipe divided body 21 and the
sheet-metal-made second inner-pipe divided body 22 that are made of
the sheet-metal-made scroll plate members, and the spiral-shaped
exhaust gas flow path K is formed in the inner pipe 20.
[0030] Furthermore, as shown in FIGS. 2 and 4, a front surface 23a
of the cast-metal-made third inner-pipe divided body 23 is formed
to have a flat portion, and is formed such that the surface area of
a lower part of the front surface 23a (the exhaust-air-inlet-side
flange 12 side) is larger than the surface area of an upper part of
the front surface 23a (the opposite side from the
exhaust-air-inlet-side flange 12). In other words, as shown in FIG.
4, the cast-metal-made third inner-pipe divided body 23 is formed
such that the regional part closer to the exhaust-air-inlet-side
flange 12 has greater thickness than the regional part on the
opposite side thereof. With such a configuration, a part of the
flow path surface k of the exhaust gas flow path K in the inner
pipe 20 is formed by the cast-metal-made third inner-pipe divided
body 23.
[0031] Furthermore, a recessed portion 23c having a stepped-annular
shape is formed on the exhaust-air-inlet side of the
cast-metal-made third inner-pipe divided body 23, and the cylinder
shaped portion (barrel shaped portion) 23d is integrally formed on
the exhaust-air-outlet side of the third inner-pipe divided body 23
so as to project out therefrom. A reinforcing member (not shown)
having an annular ring shape for protecting the turbine wheel 14 is
fitted into the recessed portion 23c having the stepped-annular
shape.
[0032] In addition, as shown in FIG. 4, an inner wall of the
cylinder shaped portion 23d is formed to have an inclined surface
23e having a conical shape, the diameter of which increases toward
the outlet side. A front-side end portion 31 of the exhaust tube 30
is fitted to the inclined surface 23e of the inner wall of the
cylinder shaped portion 23d, and both are fixed by being welded
(the welded portion is shown by the reference sign E).
[0033] As shown in FIGS. 1 to 4, the outer pipe 40 is formed of two
sheet-metal-made thin plate members, i.e. a first outer-pipe
divided body 41 and a second outer-pipe divided body 42, formed by
halving the outer pipe 40 along the shaft direction L (the
direction of vibration during the travel of the vehicle) of the
turbine shaft 14a of the turbine wheel 14. The first outer pipe
divided body 41 and the second outer pipe divided body 42 are
molded into a predetermined curved shape by subjecting the sheet
metal to the press working. Two thus-press molded members, i.e. the
sheet-metal-made first outer pipe divided body 41 and the
sheet-metal-made second outer pipe divided body 42, are joined by
the welding, and thereby, the inner pipe 20 and the exhaust tube 30
are completely covered such that the predetermined space G is
formed between the outer pipe 40 and both of the inner pipe 20 and
the exhaust tube 30.
[0034] In other words, as shown in FIGS. 1, 3, and 4, a second end
portion 41b of the sheet-metal-made first outer pipe divided body
41 extending by forming a step and a first end portion 42a of the
sheet-metal-made second outer pipe divided body 42 extending by
forming a step are fixed to each other by overlaying the first end
portion 42a on the second end portion 41b of the first outer pipe
divided body 41 and by being welded (the welded portions are shown
by the reference sign E) along the shaft direction (shaft line
direction) L of the turbine shaft 14a of the turbine wheel 14. With
such a configuration, because expansion and/or contraction is
caused about the shaft direction L of the turbine shaft 14a during
the travel of the vehicle, the welding is performed along the shaft
direction L, and thereby, a fracture of the weld line is
prevented.
[0035] In addition, as shown in FIG. 5, sheet-metal-made plates
(reinforcing plates) 45 and 46, which are press molded so as to
extend along the curved shape of the outer pipe 40, are
respectively fixed to inner surfaces of the sheet-metal-made first
outer-pipe divided body 41 and the sheet-metal-made second
outer-pipe divided body 42 forming the outer pipe 40 by welding at
one or more spots (by spot welding).
[0036] As shown in FIGS. 2 and 4, a front-circumferential-edge-side
end portion 21a of the sheet-metal-made first inner-pipe divided
body 21 of the inner pipe 20 is fixed to an inner circumferential
surface 11b of the center flange 11 by being welded (the welded
portion is shown by the reference sign E). In addition, respective
front-circumferential-edge-side end portions 41c and 42c of the
sheet-metal-made first outer pipe divided body 41 and the
sheet-metal-made second outer pipe divided body 42 forming the
outer pipe 40 are fixed to an outer circumferential surface 11c of
the center flange 11 by being welded (welded portions are shown by
the reference sign E). In the above, a plurality of screw holes 11d
for attaching bolts are formed in the center flange 11 at equal
intervals.
[0037] As shown in FIG. 4, the exhaust-air-inlet-side flange 12 is
formed so as to have a substantially annular shape, and its opening
portion 12a forms the inlet of the exhaust gas B. A recessed
portion 12c having the stepped-annular shape is formed at the inner
side of the top side of an outer circumferential surface 12b of the
exhaust-air-inlet-side flange 12, and a stepped portion 12e is
integrally formed on an intermediate part of an inner
circumferential surface 12d of the exhaust-air-inlet-side flange 12
so as to protrude radially inward. A lower end portion 21c side of
the sheet-metal-made first inner-pipe divided body 21 and a lower
end portion 22c side of the sheet-metal-made second inner-pipe
divided body 22 of the inner pipe 20 are each formed to have a
semi-arc curved shape extending along the stepped portion 12e and
loosely fitted so as to be freely extendable/contractable by
forming an opening portion (space) 25 with the stepped portion 12e.
In other words, the inner pipe 20 is provided so as to be slidable
with respect to the exhaust-air-inlet-side flange 12 in the space
25 formed between the inner pipe 20 and the exhaust-air-inlet-side
flange 12.
[0038] In addition, as shown in FIGS. 2 to 4, lower end portions
41e and 42e sides of the sheet-metal-made first outer-pipe divided
body 41 and the sheet-metal-made second outer-pipe divided body 42
forming the outer pipe 40 are respectively formed to have the
semi-arc curved shape extending along the recessed portion 12c of
the exhaust-air-inlet-side flange 12 and fixed to the upper side of
the outer circumferential surface 12b by being welded (the welded
portion is shown by the reference sign E) in a state in which both
are fitted into the recessed portion 12c.
[0039] Furthermore, as shown in FIGS. 1 to 4, at a position on the
sheet-metal-made second outer-pipe divided body 42 of the outer
pipe 40 on the opposite side from the opening portion 12a of the
exhaust-air-inlet-side flange 12 serving as the inlet of the
exhaust gas B, a cylinder-shaped boss (fluid supply/discharge port)
51 is fixed by being welded (a welded portion is shown by a
reference sign E). An opening 51a of the cylinder-shaped boss 51 is
formed to have a size capable of allowing a washing fluid to pass
through and is formed so as to be closed by a plug (closing member)
52. In addition, the opening 51a is configured so as to be
positioned directly above the spiral-shaped exhaust gas flow path K
when the turbine housing 10 is placed such that the
exhaust-air-inlet-side flange 12 faces down. Furthermore, the
opening 51a is configured so as to be positioned directly above the
scroll shape of the spiral-shaped exhaust gas flow path K when the
turbine housing 10 is placed such that the exhaust-air-inlet-side
flange 12 faces down (see FIGS. 2, 4, and so forth). With the
above-described configuration, the washing fluid that has been
supplied and introduced from the opening 51a washes the interior of
the turbine housing 10 by being distributed to the left and right
in FIG. 2 at the apex portion of the scroll shape. Therefore, the
opening 51a may not necessarily be positioned directly above an
abutting portion between the first inner-pipe divided body 21 and
the second inner-pipe divided body 22. In the above, a
communication hole 53 that communicates with the opening 51a of the
boss 51 is formed at the position of the first outer-pipe divided
body 41 facing the cylinder-shaped boss 51. In addition, a
plurality of screw holes (not shown) for attaching bolts are formed
in the exhaust-air-inlet-side flange 12 at equal intervals.
[0040] Furthermore, as shown in FIGS. 3 and 4, the
exhaust-air-outlet-side flange 13 is formed to have a substantially
rectangular plate shape, and a circular opening portion 13a forms
the outlet of the exhaust gas B at its center. A rear-side end
portion 32 of the exhaust tube 30 and respective
rear-circumferential-edge side end portions 41d and 42d of the
sheet-metal-made first outer pipe divided body 41 and the
sheet-metal-made second outer pipe divided body 42 forming the
outer pipe 40 are fixed to an inner circumferential surface 13b of
the exhaust-air-outlet-side flange 13 by being welded (the welded
portion is shown by the reference sign E). In the above, screw
holes 13d for attaching bolts are respectively formed on corner
portions of the exhaust-air-outlet-side flange 13.
[0041] The outer pipe 40 formed of the first outer-pipe divided
body 41 and the second outer-pipe divided body 42 is welded to the
center flange 11 over the entire circumference thereof, welded to
the exhaust-air-inlet-side flange 12 over the entire circumference
thereof, and welded to the exhaust-air-outlet-side flange 13 over
the entire circumference thereof. In the above, it suffices that
the outer pipe 40 is welded to the respective flanges such that the
inner pipe 20 is sealed, and welding points to the respective
flanges may appropriately be selected from their outer
circumferences or inner circumferences.
[0042] The turbine housing 10 that is assembled from a plurality of
parts such as the center flange 11, respective flanges 12 and 13,
the inner pipe 20, and the outer pipe 40, each having the
configuration as described above, is subjected to, in a subsequent
manufacturing process, operations, such as a cutting machining
processing and a washing, of respective components, and thereby, a
finished product is provided.
[0043] Next, the manufacturing steps (cutting machining processing
and washing) of the turbine housing 10 from the assembly to the
finish will be described by following a flowchart shown in FIG.
8.
[0044] First, the first inner-pipe divided body 21 and the second
inner-pipe divided body 22, which are made of sheet metals, and the
cast-metal-made third inner-pipe divided body 23 forming the inner
pipe 20 of the turbine housing 10 are assembled by being welded,
and the first outer-pipe divided body 41 and the second outer-pipe
divided body 42, which are made of sheet metals, forming the outer
pipe 40 are assembled by being welded, and thereafter, thus
assembled the inner pipe 20 and the outer pipe 40 are assembled
with the center flange 11 and the respective flanges 12 and 13 by
performing the welding (Step S1).
[0045] Next, the cutting machining processing is performed on the
respective components such as the center flange 11, the respective
flanges 12 and 13, the inner pipe 20, and the outer pipe 40 (Step
S2).
[0046] After the cutting machining processing of the respective
components has been finished, washing of the interior of the
turbine housing 10 is performed by supplying high-pressure washing
water (the washing fluid) M from the opening 51a of the
cylinder-shaped boss 51 provided on the ceiling side of the outer
pipe 40 (Step S3). By performing the washing, it is possible to
wash off the extraneous matters such as the chips, etc. generated
by the cutting machining processing with the high-pressure washing
water M. In other words, it is possible to wash the extraneous
matters such as chips, etc. generated at the time of the cutting
machining processing of the respective components of the turbine
housing 10 to the outside from the opening portion 25 that is
provided between the exhaust-air-inlet-side flange 12 and the lower
end portions 21c and 22c of the inner pipe 20 on the
exhaust-air-inlet side. By doing so, because the extraneous matters
such as chips, etc. generated by the cutting machining processing
can be removed easily and reliably, it is possible to satisfy the
strict standard for the amount of trapped extraneous matter in the
interior.
[0047] The washing of the extraneous matter may be performed by
placing the turbine housing 10 in a horizontal orientation, by
supplying the high-pressure washing water M from the opening
portion 25 that is provided between the exhaust-air-inlet-side
flange 12 and the lower end portions 21c and 22c of the inner pipe
20 on the exhaust-air-inlet side, and by washing the extraneous
matters such as chips, etc. generated at the time of the cutting
machining processing of the respective components to the outside
from the opening 51a of the boss 51 provided on the ceiling side of
the outer pipe 40.
[0048] Finally, the plug 52 is fixed to the cylinder-shaped boss 51
serving as the supply/discharge port of the washing water M by
being welded to close the opening 51a of the boss 51 (Step S4). By
doing so, it is possible to produce the product of the turbine
housing 10 that meets the strict standard for the amount of trapped
extraneous matter in the interior easily, reliably, and at low
cost.
[0049] In addition, after the washing is finished, because the
cylinder-shaped boss 51 is closed with the plug 52 and the plug 52
is fixed by being welded, the exhaust gas B is prevented from
leaking out from the outer pipe 40.
[0050] Furthermore, because a closed state of the plug 52 can be
inspected by visually viewing the outer pipe 40, it is possible to
easily confirm that the interior of the product has been washed and
that the product meets the strict standard for the amount of
trapped extraneous matter in the interior.
[0051] In the above, according to the first embodiment, although
the plug is welded to the top end portion of the boss in order to
close the opening of the boss, it may possible to fix the plug to
the boss by forming a thread in the inner circumferential surface
side of the boss, by fixing a bolt on the inner surface side of a
ceiling of the plug, and by threading the bolt.
[0052] Next, a turbine housing 10A of a second embodiment of the
present invention will be described with reference to FIGS. 9 to
12, and a turbine housing 10B of a third embodiment of the present
invention will be described with reference to FIG. 13.
[0053] As shown in FIGS. 9 to 12, the second embodiment differs
from the first embodiment in that a fluid inlet/outlet hole (a
fluid supply/discharge port) 55 having a predetermined shape is
formed at a position on the sheet-metal-made second outer-pipe
divided body 42 of the outer pipe 40 on the opposite side from the
opening portion 12a of the exhaust-air-inlet-side flange 12 serving
as the inlet of the exhaust gas B, and the fluid inlet/outlet hole
55 is closed by a sheet-metal-made plate material (closing member)
56 having a predetermined shape. In the above, because other
configurations are similar to those in the first embodiment, the
same reference numerals are assigned to the same components, and a
detailed description thereof will be omitted.
[0054] As shown in FIG. 13, the third embodiment differs from the
first embodiment in that the fluid inlet/outlet hole (the fluid
supply/discharge port) 55 having the predetermined shape is formed
at the position of the sheet-metal-made second outer-pipe divided
body 42 of the outer pipe 40 directly above the abutting portion
between the rear-circumferential-edge-side end portion 21b and the
front-circumferential-edge-side end portion 22a of two
sheet-metal-made members, i.e. the first inner-pipe divided body 21
and the second inner-pipe divided body 22, and the fluid
inlet/outlet hole 55 is closed by the sheet-metal-made plate
material (closing member) 56 having the predetermined shape. In the
above, because other configurations are similar to those in the
first embodiment, the same reference numerals are assigned to the
same components, and a detailed description thereof will be
omitted.
[0055] Similarly to the first embodiment, also in the second
embodiment and the third embodiment, the plurality of parts forming
the turbine housing 10A, 10B are assembled and subjected to the
cutting machining processing. Thereafter, the interior of the
turbine housing 10A, 10B is washed by supplying the high-pressure
washing water M from the fluid inlet/outlet hole 55 (in other
words, the opening through which the washing fluid can pass
through) that is provided on the ceiling side of the outer pipe 40
such that the extraneous matters such as chips, etc. generated at
the time of the cutting machining processing of the respective
components are washed out from the opening portion 25 that is
provided between the exhaust-air-inlet-side flange 12 and the lower
end portions 21c and 22c of the inner pipe 20 on the
exhaust-air-inlet side. Alternatively, it is possible to place the
turbine housing 10A, 10B in the horizontal orientation and to
supply the high-pressure washing water M from the opening portion
25 that is provided between the exhaust-air-inlet-side flange 12
and the lower end portions 21c and 22c of the inner pipe 20 on the
exhaust-air-inlet side such that the extraneous matters such as
chips, etc. generated at the time of the cutting machining
processing of the respective components are washed out from the
fluid inlet/outlet hole 55 that is provided in the ceiling side of
the outer pipe 40.
[0056] Similarly to the first embodiment, after the interior of the
turbine housing 10A, 10B has been washed, the fluid inlet/outlet
hole 55, which is the supply/discharge port of the washing water M,
is then closed by fixing the sheet-metal-made plate material 56 to
the fluid inlet/outlet hole 55 by welding, and thereby, it is
possible to manufacture the turbine housing 10A, 10B that meets the
strict standard for the amount of trapped extraneous matter in the
interior easily, reliably, and at low cost.
[0057] In addition, after the washing is finished, because the
fluid inlet/outlet hole 55 is closed with the sheet-metal-made
plate material 56, the exhaust gas B is prevented from leaking out
from the outer pipe 40. Furthermore, because the closed state of
the sheet-metal-made plate material 56 can be inspected by visually
viewing the outer pipe 40, it is possible to easily confirm that
the interior of the product has been washed and that the product
meets the strict standard for the amount of trapped extraneous
matter in the interior.
[0058] Especially, according to the third embodiment, it is
possible to allow the abutting portion between the
rear-circumferential-edge-side end portion 21b and the
front-circumferential-edge-side end portion 22a of two
sheet-metal-made members, i.e. the first inner-pipe divided body 21
and the second inner-pipe divided body 22 to have a function of
distributing the washing fluid, and therefore, it is possible to
thoroughly wash outer wall of the inner pipe 20. By providing the
opening 51a so as to be positioned directly above the apex of the
scroll shape in the spiral-shaped exhaust gas flow path K and
directly above the abutting portion between the first inner-pipe
divided body 21 and the second inner-pipe divided body 22, in
addition to the function of distributing the washing fluid to the
left and right directions in FIG. 2, a function of distributing the
washing fluid to the directions orthogonal to the plane of FIG. 2
(the left and right directions in FIG. 13) can also be achieved,
and therefore, it is possible to wash the interior of the turbine
housing 10 more thoroughly.
[0059] In the above, according to each of the embodiments, although
the washing water is used as a washing fluid, a gas, such as
compressed air, etc., may be used as the washing fluid.
[0060] In summary, according to each of the embodiments, it is
possible to provide the turbine housing from which the extraneous
matter in the interior of the turbine housing can be removed by
washing and the washing method of the turbine housing.
REFERENCE SIGNS LIST
[0061] 10, 10A, 10B: turbine housing [0062] 12:
exhaust-air-inlet-side flange [0063] 12a: opening portion (exhaust
gas inlet) [0064] 13: exhaust-air-outlet-side flange [0065] 13a:
opening portion (exhaust gas outlet) [0066] 14: turbine wheel
[0067] 20: inner pipe (scroll portion) [0068] 21: sheet-metal-made
first inner-pipe divided body (sheet-metal-made scroll member)
[0069] 21c: lower end portion [0070] 22: sheet-metal-made second
inner-pipe divided body (sheet-metal-made scroll member) [0071]
22c: lower end portion [0072] 23: cast-metal-made third inner-pipe
divided body (scroll member made of cast metal, which is formed by
casting as a material having higher heat resistance than material
made of sheet metal) [0073] 25: opening portion (space) [0074] 40:
outer pipe [0075] 41: sheet-metal-made first outer-pipe divided
body [0076] 41e: lower end portion [0077] 42: sheet-metal-made
second outer-pipe divided body [0078] 42e: lower end portion [0079]
51: cylinder-shaped boss (fluid supply/discharge port) [0080] 51a:
opening [0081] 52: plug (closing member) [0082] 55: fluid
inlet/outlet hole (fluid supply/discharge port) [0083] 56:
sheet-metal-made plate material (closing member) [0084] B: exhaust
gas [0085] K: spiral exhaust gas flow path [0086] G: space [0087]
O: spiral center portion (center portion) [0088] E: welded portion
[0089] M: washing water (the washing fluid)
* * * * *